It's a unique choice for Apple given that Z68 incorporates features that Apple doesn't seem to use in the new iMac (SSD caching, overclocking). But perhaps we will eventually see Apple embrace SSD caching in future models?

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I thought the whole point of quicksync was that you did not need a monitor connected to both GPUs - that it can make use of IGP features without having to physically switch cables etc. Otherwise, what would be the point of the technology?Reply

"There’s just one hangup to all of this Quick Sync greatness: it only works if the processor’s GPU is enabled. In other words, on a desktop with a single monitor connected to a discrete GPU, you can’t use Quick Sync."

You need switchable graphics such as Virtu or Synergy to take advantage of QS with dGPU and one monitor. Reply

I thought Z68's other big feature was QuickSync support even when using a discrete GPU as the primary output. Hardware accelerated encoding would definitely be something that would appeal to Apple. Hopefully support will be incorporated into QuickTime X and iTunes in Lion if not sooner.Reply

There is a new process running in the latest Lion that might have something to do with caching, don't remember the exact name as it pops up every now and then.(I have the latest 11" MBA). The process takes up a lot of resources when new discs are connected to the system and accessing the subfolders of that external drive feels a lot snappier on Lion than on my iMac with SL. When the disc is disconnected it looks like this on my desktop. http://cl.ly/2B06333S2X2o2X1m1a15Reply

They're likely just caching the folder hierarchy in RAM. Accessing subfolders on EXT2/3/4 in Linux (especially using a GUI) is/was a fairly slow ordeal. Perhaps they're just trying to speed up the process?Reply